Large-diameter pipeline installation construction method

Abstract

The invention discloses a large-diameter pipeline installation construction method, and relates to the technical field of pipeline installation construction. The installation construction efficiency is improved; comprising the following steps that a three-dimensional laser scanner is used for scanning a constructed pipe gallery structure, a reverse engineering technology is used for creating a three-dimensional model according to scanning data, and an accurate structure model foundation is provided for subsequent steps by comparing the reverse model with an original design drawing and searching errors; the BIM technology is used for simulating electromechanical installation engineering, pipeline arrangement is optimized, and detailed processing material lists including pipeline length, diameter, wall thickness, flanges and other data are provided; and the pipeline is prefabricated according to the processing material list, and the process comprises numbering, flange welding, welded junction anti-corrosion construction and pre-assembly. By means of the three-dimensional laser scanning and reverse modeling technology, actual data of the constructed pipe gallery structure can be accurately obtained and compared with an original design drawing, and errors are found and corrected in time.

Description

Technical Field

[0001] The present invention relates to the technical field of pipeline installation construction, and particularly relates to a construction method for installing large-diameter pipelines. Background Art

[0002] In the prior art, in the construction of modern urban infrastructure, the installation construction of large-diameter pipelines is a crucial engineering link. Especially in the construction of pipe gallery structures, its complexity and accuracy requirements are extremely high. Traditional construction methods for large-diameter pipelines often rely on manual measurement and manual drawing, which are not only inefficient but also prone to errors, leading to many problems in subsequent construction. With the progress of technology, three-dimensional laser scanning technology and reverse engineering technology have begun to be widely used in the engineering field, which not only greatly improves the accuracy and integrity of construction data but also provides a reliable structural model basis for subsequent BIM (Building Information Modeling) comprehensive layout.

[0003] However, relying solely on a high-precision three-dimensional model is not sufficient to solve all problems. During the actual installation of pipelines, collisions and elevation conflicts between pipelines are common problems. Traditional solutions often require problems to be discovered during the construction process and then modified and adjusted, which not only increases the construction difficulty and cost but also may cause delays in the construction period.

[0004] In summary, in order to ensure construction quality and efficiency, it is necessary to continuously research and improve related technologies to adapt to the changing market demands and engineering requirements, thereby improving the efficiency of large-diameter pipeline installation and ensuring the safety and efficiency during the installation of large-diameter pipelines. Summary of the Invention

[0005] The purpose of the present invention is to solve the deficiencies in the prior art and propose a construction method for installing large-diameter pipelines.

[0006] To achieve the above purpose, the present invention adopts the following technical solutions:

[0007] A construction method for installing large-diameter pipelines includes the following steps:

[0008] S1: Use a three-dimensional laser scanner to scan the constructed pipe gallery structure, and use reverse engineering technology to create a three-dimensional model based on the scanned data. By comparing the reverse model with the original design drawings, find errors to provide an accurate structural model basis for subsequent steps;

[0009] S2: Use BIM technology to simulate the mechanical and electrical installation project, optimize the pipeline layout, and issue a detailed processing material list, including pipeline length, diameter, wall thickness, and flange data;

[0010] S3: Prefabricate and process the pipeline according to the processing bill of materials, including numbering, flange welding, weld joint anti-corrosion construction, and preliminary assembly;

[0011] S4: Use a special transportation device to safely transport the prefabricated pipeline to the installation site, and position and install it according to the design drawings and on-site conditions;

[0012] S5: For thermal pipelines, use PUR finished adiabatic supports for on-site assembly construction;

[0013] S6: Conduct construction disclosure before construction and supervise during the construction process to ensure construction quality;

[0014] S7: After the pipeline is installed in place, carry out welding and anti-corrosion treatment.

[0015] Preferably: In step S1, it also includes accurately setting the scanning angle, distance, and light conditions to ensure the accuracy and integrity of the scanning data.

[0016] Furthermore: In step S2, use the collision detection function of BIM software to find the collision points and elevation conflicts between pipelines, and adjust the pipeline alignment and elevation according to the detection results to ensure the rationality and feasibility of the pipeline layout.

[0017] Furthermore: In step S3, before prefabricating and processing the pipeline, preheat the welds. During welding, ensure the perpendicularity of the flange and the pipeline, the welds are fully penetrated and not burned through. After welding, carry out cleaning, visual inspection, and non-destructive testing.

[0018] As a preferred solution of the present invention: In step S4, when using a special transportation device for large-diameter pipelines, ensure the stability and safety of the pipeline during transportation, avoid damage or deformation, and keep transportation records.

[0019] As a further solution of the present invention: In step S5, the assembly construction of thermal pipelines includes using a theodolite, a level, and a steel tape to determine the pipeline alignment, specifications, and valve positions, and using a laser infrared instrument for accurate setting out to ensure the accuracy and stability of the support installation.

[0020] As a still further solution of the present invention: In step S6, the on-site disclosure clarifies the construction requirements, steps, and precautions. The construction supervision includes the supervision of the pipeline installation position, elevation, slope, weld quality, and anti-corrosion treatment content, and keep construction records.

[0021] On the basis of the foregoing solutions: In step S7, the pipeline welding quality complies with relevant standards. After the welds are cleaned, epoxy resin paint is brushed for anti-corrosion treatment, and the flange part is brushed with red anti-corrosion paint. The paint is fully stirred before painting to ensure uniform coating without omission.

[0022] Based on the above - mentioned solution, the construction method further includes the step of system commissioning after construction is completed to ensure the normal operation of the pipeline system. The commissioning content includes the sealing performance, pressure stability, and temperature control accuracy of the pipeline system.

[0023] Based on the above - mentioned solution, after the system commissioning step is completed, acceptance is carried out. The acceptance content includes the installation quality, function realization, safety of the pipeline system, and whether it meets the design requirements, and an acceptance report is issued.

[0024] The beneficial effects of the present invention are as follows:

[0025] 1. A construction method for installing large - diameter pipelines. Through three - dimensional laser scanning and reverse modeling technology, it can accurately obtain the actual data of the constructed pipe gallery structure, compare it with the original design drawings, promptly discover and correct errors, and provide an accurate structural model basis for subsequent BIM comprehensive layout.

[0026] 2. A construction method for installing large - diameter pipelines. By using BIM technology for pipeline layout simulation and collision detection, it can foresee and solve the collision points and elevation conflicts between pipelines before construction, avoiding modifications and adjustments during the construction process. This not only reduces the construction difficulty but also lowers the construction cost.

[0027] 3. A construction method for installing large - diameter pipelines. According to the processing material list issued by BIM software for prefabricating and processing pipelines, it can accurately control the size, specifications, and materials of the pipelines, reduce material waste and processing errors, and carry out pipeline flange welding, weld anti - corrosion construction, and pre - assembly in the processing factory, improving the processing quality and efficiency.

[0028] 4. A construction method for installing large - diameter pipelines. Using a special transportation device for large - diameter pipelines for pipeline transportation ensures the stability and safety of the pipelines. Records are made during transportation for subsequent tracking and tracing, and pipeline positioning and installation are carried out according to the design drawings and the actual situation on - site, ensuring the accurate pipeline position and elevation meeting the design requirements.

[0029] 5. A construction method for installing large - diameter pipelines. Adopting an assembled construction method and using PUR finished thermal insulation supports for installation improves the construction efficiency and quality. Through measures such as accurate setting - out and setting up gantry boards, the accuracy and stability of support installation are ensured. By cleaning and anti - corrosion treatment of the welds, the durability and service life of the pipelines are enhanced. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is a flow chart showing a construction method for installing large - diameter pipelines proposed by the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] The technical solution of this patent will be further described in detail below in conjunction with specific embodiments.

[0032] The embodiments of this patent will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain this patent and should not be construed as a limitation of this patent.

[0033] Embodiment 1:

[0034] A construction method for installing large-diameter pipelines, as Figure 1 shown, includes the following steps:

[0035] S1: Scanning and reverse modeling:

[0036] Use a three-dimensional laser scanner to comprehensively scan the completed pipe gallery structure to ensure the accuracy and integrity of the scan data. When scanning, it is necessary to set the scan angle, distance, and light conditions;

[0037] Transmit the scan data to the processing device in real time, and use reverse engineering technology to perform three-dimensional modeling based on these data to check the integrity of the data;

[0038] By comparing the reverse model with the original design drawings, find the errors between the completed structure and the drawings, and provide an accurate structural model basis for subsequent BIM comprehensive layout;

[0039] S2: Optimize pipeline layout using BIM technology:

[0040] Utilize BIM (Building Information Modeling) technology to simulate the mechanical and electrical installation project before construction, collect relevant information such as architectural design drawings, equipment lists, pipeline specifications, etc., organize and import them into BIM software to ensure the consistency and accuracy of the data. Preview the pipeline layout after construction on the computer, including factors such as pipeline routing, valve positions, bracket arrangements, and the positioning of pipeline laying positions;

[0041] Use BIM software (such as Revit, AutoCAD BIM 360, etc.) to create a three-dimensional building model, and gradually add mechanical and electrical installation elements such as pipelines, valves, and brackets;

[0042] Utilize the collision detection function of BIM software to find the collision points and elevation conflicts between pipelines, analyze the reasons for collisions, such as unreasonable design, insufficient space, etc. According to the detection results, adjust the pipeline routing and elevation to ensure the rationality and feasibility of the pipeline layout;

[0043] Based on the BIM simulation results, issue a detailed processing material list, including data such as pipe length, diameter, wall thickness, and flanges. Then, combined with the collision detection results, further optimize the pipeline, such as adjusting the pipeline route, adding or reducing supports, and making fine-tuning to the pipeline layout considering construction convenience and future maintenance requirements;

[0044] Based on the BIM simulation results, issue a detailed processing material list, including pipe length, diameter, wall thickness, and flange data, to ensure the accuracy and integrity of the material list

[0045] S3: Pipeline prefabrication and processing:

[0046] According to the processing material list issued by the BIM software, comprehensively number the pipelines. The numbers should be clear for subsequent transportation;

[0047] Carry out pipeline flange welding, weld joint anti-corrosion construction, and pre-assembly in the processing factory. Before welding, preheat the weld seams to reduce welding stress and deformation. For stainless steel materials, preheating and interpass temperature control are particularly important;

[0048] During welding, ensure the perpendicularity of the flange and the pipeline to avoid too large a parallelism deviation between the two flanges during bolt connection, resulting in leakage due to the gasket not being clamped tightly;

[0049] The weld seams should be fully penetrated and not burned through. The thickness of each layer of the weld seam should be preferably 0.8 - 1.2 times the diameter of the welding electrode, and the starting and ending points of each layer should be staggered;

[0050] After welding, clean the weld seams, remove impurities such as welding slag and spatter, and conduct necessary visual inspection and non-destructive testing;

[0051] S4: Pipeline transportation and installation:

[0052] Use a special transportation device for large-diameter pipelines to safely and efficiently transport the prefabricated and processed pipelines to the installation site in the pipe gallery;

[0053] During transportation, ensure the stability and safety of the pipelines, avoid damage or deformation, and keep transportation records for subsequent tracking and traceability;

[0054] Transport the prefabricated and processed pipelines to the installation site in the pipe gallery, and position them according to the design drawings and the actual on-site situation to ensure that the pipeline position is accurate and the elevation meets the design requirements;

[0055] S5: Prefabricated construction of thermal pipelines:

[0056] For thermal pipelines, PUR (polyurethane) finished thermal insulation supports are used for installation, and assembly construction is carried out on site. Place the base with polytetrafluoroethylene board in the middle of the bracket crossbeam, and use a laser infrared instrument for precise alignment to ensure the accuracy and stability of the support installation;

[0057] When carrying out assembly construction on thermal pipelines, the specific construction process includes the following steps:

[0058] For information such as the alignment, specifications, and valve positions of thermal pipelines, prepare a theodolite, a level, and a steel tape;

[0059] Use a theodolite to lead out coordinate stakes at the parts where the pipeline changes direction as reference points for the pipeline alignment. Use a level to drive in level stakes at the pipeline grade change points to ensure that the pipeline grade meets the design requirements. Set up portal frames on the coordinate stakes and level stakes and ensure their horizontality. The portal frames will be used as the benchmarks for marking the trench depth;

[0060] S6: On-site disclosure and construction supervision:

[0061] Before construction, conduct on-site disclosure to the construction team, clarify the construction requirements, steps, and precautions, elaborate on key information such as the overall objectives, quality standards, and time nodes of the engineering project, and gradually analyze the specific operation steps of each construction link according to the construction plan, including the required materials, tools, and equipment. Confirm the construction team's understanding of the construction requirements, steps, and precautions through forms such as Q&A and discussions;

[0062] During the construction process, arrange special personnel for construction supervision to ensure that the construction quality meets the design requirements. The supervision content includes the installation position, elevation, grade, etc. of the pipeline, conduct visual inspection and non-destructive testing (such as X-ray, ultrasonic wave, etc.) on the welds to ensure that the weld quality meets the relevant standards, supervise the painting quality and coating thickness of the anti-corrosion coating, and record in detail the key information during the construction process, including but not limited to the construction date, personnel allocation, and material usage. Regularly evaluate the construction progress, quality, safety, etc.;

[0063] S7: Pipeline welding and anti-corrosion treatment:

[0064] After the pipeline is installed in place, carry out the welding work between the pipeline and the flange to ensure that the welding quality meets the relevant standards;

[0065] Clean the welds and apply epoxy resin paint for anti-corrosion treatment. Apply red anti-corrosion paint to the flange part to enhance its durability;

[0066] When carrying out anti-corrosion construction on the welds, the anti-corrosion coating should be fully stirred before painting to ensure uniform coating; appropriate painting tools and methods should be used during painting, such as brushing and spraying, to ensure uniform coating without omission;

[0067] For the already installed and welded weld seams, they shall be pre-coated manually once before weld seam painting. Use a paintbrush to make the coating penetrate into the depressions, gaps, uneven places, etc. of the weld seams.

[0068] As described above, this is a preferred specific embodiment of the present invention. The protection scope of the present invention is not limited thereto. Any modification, equivalent replacement, improvement, etc. made by any person skilled in the art within the technical scope disclosed by the present invention in combination with the prior art or common general knowledge and within the spirit and principle of the present invention shall be covered within the protection scope of the present invention.

Claims

1. A large diameter pipeline installation construction method, characterized in that: The following steps are involved: S1: Use a 3D laser scanner to scan the completed pipe gallery structure, and use reverse engineering technology to create a 3D model based on the scanned data. By comparing the reverse model with the original design drawings, find errors and provide an accurate structural model basis for subsequent steps; S2: Use BIM technology to simulate mechanical and electrical installation projects, optimize pipeline layout, and issue detailed processing material lists, including pipeline length, diameter, wall thickness and flange data; S3: Prefabricate the pipeline according to the processing material list, including numbering, flange welding, weld anti-corrosion construction and pre-assembly; S4: Use special transport equipment to safely transport the prefabricated pipeline to the installation site, and locate and install it according to the design drawings and on-site conditions; S5: For thermal pipelines, PUR finished insulation supports are used for on-site assembly construction; S6: Conduct construction briefing before construction and supervise the construction process to ensure construction quality; S7: After the pipeline is installed in place, welding and anti-corrosion treatment are carried out.

2. A large diameter pipeline installation construction method according to claim 1, characterized in that: Step S1 also includes precise settings of the scanning angle, distance and lighting conditions to ensure the accuracy and completeness of the scanned data.

3. A large diameter pipeline installation construction method according to claim 2, characterized in that: In step S2, the collision detection function of the BIM software is used to find the collision points and elevation conflicts between pipelines, and the pipeline direction and elevation are adjusted according to the detection results to ensure the rationality and feasibility of the pipeline layout.

4. A large diameter pipeline installation construction method according to claim 3, characterized in that: In step S3, the weld is preheated before the pipeline is prefabricated, the verticality of the flange and the pipeline is ensured during welding, the weld is fully welded and must not be burned through, and cleaning, appearance inspection and non-destructive testing are performed after welding.

5. A large diameter pipeline installation construction method according to claim 4, characterized in that: In step S4, when using special transportation equipment for large-diameter pipelines, ensure the stability and safety of the pipelines during transportation, avoid damage or deformation, and keep good transportation records.

6. A large diameter pipeline installation construction method according to claim 5, characterized in that: In step S5, the prefabricated construction of thermal pipelines includes using theodolites, levels and steel rulers to determine the pipeline direction, specifications and valve positions, and using laser infrared instruments for precise layout to ensure the accuracy and stability of support installation.

7. A large diameter pipeline installation construction method according to claim 6, characterized in that: In step S6, construction requirements, steps and precautions are clarified during on-site briefing. Construction supervision includes supervision of pipeline installation location, elevation, slope, weld quality and anti-corrosion treatment content, and construction records are kept.

8. A large diameter pipeline installation construction method according to claim 7, characterized in that: In step S7, the pipeline welding quality meets the relevant standards. The weld is cleaned and then painted with epoxy resin paint for anti-corrosion treatment. The flange is painted with red anti-corrosion paint. The paint is fully stirred before painting to ensure that the coating is even and without omissions.

9. A large diameter pipeline installation construction method according to claim 8, characterized in that: The construction method also includes the step of system debugging after the construction is completed to ensure the normal operation of the pipeline system. The debugging content includes the sealing of the pipeline system, pressure stability, and temperature control accuracy.

10. A large diameter pipeline installation construction method according to claim 9, characterized in that: After the system debugging steps are completed, acceptance is carried out. The acceptance content includes the installation quality, function realization, safety of the pipeline system and whether it meets the design requirements, and an acceptance report is issued.

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